Thread: One Way To Build A 12 Cylinder Ardun or not

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Originally Posted by robot

Pat, the problem that Ken is facing regarding the rocker arm is the layout ends up with one rocker arm that is rather short and one really long....because one valve stem axis is laid towards the centerline of the engine and one valve towards the outside. The Brazilian V8-60 hemis had this problem....was not friendly to revs.

mike in tucson

well then throw some bucks over the top of the valves and set a cam over them .over head v12 or ?? stick some JAG heads on it

http://home.comcast.net/~fairlane2k/Emi ... m-Test.wmv

Here is the problem, but I have a solution. I will get back on here later and show you.
Ken
It didn't work, if you do a search for V8 60 Ardun, the fifth site down it says The Hemi.com View topic - Brazilian V8 Hemi Video, you can see what is going on in the valve train.

Don- You are underestimating yourself, there isn't any difference in building a motor or a car. It's just different information, and you need different tools.

Pat-You are right, we can and are going to make the valve train. JE makes our pistons.

BradC- The head would be split threw the intake and exhaust ports, so we could completely machine the ports.

Mike- I think we have a way of fixing that, see below.

Pat- It's funny you should suggest that. When people find out you are doing something like this you get to see some pretty strange pieces. A guy came over to show me his V8 60 motor he put Suzuki 4 cylinder heads on.


This is what we are thinking. The valves on the flathead are 5 degrees tilted toward the piston. I'm going to move it 10 degrees toward the intake manifold. So now the push rod (taking the place of the valve) will be at 5 degrees the other way. This will allow more room for the rocker arm to get longer which is what we need. Because now the valves will be put in horizontally to the block just like they are in the block This will eliminate that long exhaust rocker arm that Ardun heads had because they put the valves in there heads vertically to the head. Now both rockers will be the same length. The rockers I made for the EVO motor looks like they will work. I made them out of billet first than after testing we had the tooling made and cast them out of stainless to decrease there size, it eliminated a lot of the bulkiness of the aluminum.
We are dealing with a 2 7/8 bore dia. Things get tight really fast.
Ken

if you needed more off set you could bore the valve seats right out and press sleeves in and run a off set push rod cup lifter if your going roller cam ?

Pat- We are going to run a roller cam and lifters but the water jacket is right there where the valve guide used to be. All I can get is 5 degrees, I wish I could get about 13 to 15 degrees, it would make things a lot better. We are going to run a smaller exhaust valve than what they have so we can roll the valves further over to the exhaust side.
Ken